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� , ,�nrc'r1ru11 E/ll'1roii 11c'111cll1lc'�tis'��rl <br /> f <br /> t ACE 17 <br /> f <br /> t AEN (CALIFORNIA) <br /> t . QUALITY CONTROL REPORT <br /># AEN JOB NUMBER: 9608132 <br /> CLIENT PROJECT ID: 41820-003-00 <br /> Ouality Control and project Summar <br /> All laboratory quality control parameters were found to be within established <br /> limits. <br /> a � <br /> �r <br /> f <br /> :Defin_�tions <br /> Laboratory Control Sample (LCS)/Method Spike(s); Control samples of known composition. LCS and Method Spike <br /> data are used to validate batch analytical results. <br /> � Matrix Spike(s): Aliquot of a sample <br /> subjected k the entire analytical aqueous or solid) with added quantities of specific compounds and <br /> Y procedure. Matrix spike and matrix spike duplicate QC data are advisory. <br /> Method Blank: An analytical control consisting of all reagents, internal standards, and surrogate standards <br /> E carried through the entire analytical process. Used to monitor laboratory background and reagent contamination. <br /> ff ' Not Detected (ND): Not detected at or above the reporting limit. <br /> Relative Percent Difference (RPD): An indication of method precision based on duplicate analysis. <br /> P ' <br /> 1 Reporting Limit (RL): The lowest concentration routinely determined during laboratory operations. The RL is <br /> generally 1 to 10 times the Method Detection Limit (MDL). Reporting limits are matrix, method, and analyte <br /> dependent and take into account any dilutions performed as part of the analysis. <br /> Surrogates: Organic compounds which are similar to analytes of interest in chemical behavior, but are not found <br /> in environmental samples. Surrogates are added to all blanks, calibration and check standards, samples, and <br /> spiked samples. Surrogate recovery is monitored as an indication of acceptable sample preparation and <br /> instrumental performance. <br /> D: Surrogates diluted out. <br /> l#: Indicates result outside of established laboratory GC limits, f <br /> I <br /> w <br />